DE6930428U - MULTI-SPINDLE BELT DRIVE FOR SPINNING AND TWISTING MACHINES - Google Patents

Description

Patent engineer Georg Hansmannrf VDI.:. * ^: .. ^:: .. ^: "· .. ' Y. · ^

£ Hamburg 50 Alfona · Julius-Leber-Strasse 21 "^

Atlas-MaK Maschinenbau GmbH Kiel-Priedrichsort, July 28, 1969

A 217 - G. 3125

Multi-spindle belt drive for spinning and twisting machines

The innovation relates to a multi-spindle belt drive for spinning and twisting machines in which all spindles of a spindle bank section a machine side by means of a common drive belt from a single drive wheel, which is on a horizontal within the machine in the longitudinal direction arranged shaft sits, is driven, the belt via guide and Tension rollers as well as end and middle pulleys on the spindle bench is guided in such a way that it touches all whorls of the spindles on an arc of the same size of about 15 degrees.

It is known to drive a larger number of spindles as a unit by means of a common drive belt. This drive version could not prevail because the service life of the usual drive belts was too short and this required one The frequency of alternating bending and stress simply could not endure. High-performance tapes made from synthetic fabrics however, have a much longer service life that such a tape guide with an appropriate construction make it interesting again.

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The task of the innovation is to use high resp. High-performance belts to achieve a reasonable, if possible above-average service life and continue to use the simplest Arrangement with targeted reduction of the belt length and the deflection points to reduce the belt load relatively. In order to be most economical Operation and most economical production for a significantly increased power requirement. The known woven cotton or linen tapes are required because of their relatively high extensibility and relatively great length a long pre-stretching path with correspondingly complex mobility of the associated tensioning rollers in order to bias the To be able to adjust and readjust bands. The low-stretch high-performance belts as well as further improved high-performance belts, E.g. made of a polyester thread insert with a polyurethane layer sanded on both sides, do not wear out.

The known tapes had to be sewn together or otherwise joined together in the machine, whereby the point of overlap has always been a sore point and was able to prevent high-speed tours on its own. With today's possibility, the tapes are endless produce, this sore point is eliminated and the tapes can continue to be as required in different widths of a prefabricated hose (inner circumference corresponds to the endless Tape length). The tool and with it the Bänuer amortize faster with the larger edition

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and can be manufactured particularly economically if the Construction of the machine with different spindle pitches and sizes on the same length of the endless belts, without additional costs can be of different widths, is respected. A tape length of e.g. 3 x 500 mm for an 80 mm spindle pitch (Band width approx. 12 mm) and e.g. 18 small spindles can also be used for a 200 mm spindle pitch (band width approx. 22 mm) and 8 large spindles can be used. Of course, the medium and possibly even larger pitches and spindle sizes should be used in the same way, corresponding to the usual Spindle size gradations, (also on a machine with fields of the same size or spindle bank sections that are in the area of the Machine frame walls, without changing the spindle spacing, collide) be designed. In order to keep the endless belts as short as possible in accordance with the task, the spindles should always of a spindle field can only be driven by a belt on one side of the machine. Traditionally, double-sided machines have Depending on the design, either a central drive shaft or a special drive shaft with the corresponding one for each spindle side Drive pulleys inside the machine frame. Of course, the individual belt drives should have a minimum of belt lengths have a defining distance (e.g. between the shafts and the spindle bench) and a minimum amount of deflection and other guide rollers. at For example, the two belts of two opposite spindle fields on a single one can only correspond to one central shaft

widened drive pulley be placed next to each other.

Tests carried out confirm that it will only be very seldom necessary to replace the belt. For emergencies you can use Assembly of the machine one replacement belt per spindle field or for each two opposite spindle fields on the machine frame or in the associated drive pulley and already the The shaft or the hub must be inserted wrapped around it.

The subject of the innovation is shown in the drawing. Show it:

Fig. 1 Opposite spindle bank sections from a

Ring spinning machine driven separately on both sides in plan view,

FIG. 2 shows a side view of a spindle belt drive, approximately as section I-I in FIG. 1

Figure 3 is a side view of another known type of tape drive approximately as section I-I in FIG. 1

4 shows a plan view of a double-wide drive pulley with a spindle drive shared on both sides.

In Fig. 1, the endless, highly flexurally resistant belt 1 wraps around the drive pulley with a wrap angle of over 225 degrees (Fig. 2) 4 on the drive shaft 2 of a ring spinning machine driven separately on both sides. It runs over a vertical roller 5

and a horizontal roller 6, deflected by two tension rollers 7 and 8, which are movably mounted on swivel arms 14, by springs 9 tensioned and by the end (10) and central (11) pressure rollers fixedly arranged on the spindle bank 26 on the whorls 2} the Spindles J5 (of a right (24) or left (25) side spindle section 12 with a small wrap angle ß) pressed, without further action either in one direction or the other. The illustrated spindle bank section 12 comprises 18 spindles with 10 pressure rollers. There can also be more or fewer spindles for a section with correspondingly different ones Bank length can be selected, however, it is useful to set the section length for all spindle sizes and thus the tape length and strength should be kept constant (the more and the larger the spindles J5 are for a band 1, the stronger it has to be to be that which is only possible at the expense of fatigue strength; on the other hand, the longer the tape, the fewer parts there will be required.) The occasional individual braking of the spindle 3 up to and during the standstill can with smaller spindles with Small division done in a conventional manner by simply stopping the spindles without the drive belt 1 being lifted or should be relaxed. The slipping of the tape 1 over the stationary spindle whirl 2j5 caused as a result of the low Wrap angle ß and the relatively long high-performance band, even with prolonged braking, only very little heating unl so to speak no significant abrasion (test tapes have

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more than 5,000 operating hours and more than 200 braking operations of 6 seconds per hour without having to be replaced afterwards). Even if several spindles are braked at the same time, the reaction of the braking force on the tension of the passing belt 1 is so small, and thus the drive entrainment of the other rotating spindles J> so consistently intense that no speed fluctuations during this period can be detected in the latter spindles. In the case of larger spindles, a considerably higher drive force transmission is required, which is expediently switched off when the spindles are braked in the usual way by simultaneously lifting the belt or by using conventional whorl clutches.

The spacing t between the spindles can also be maintained at the joints with the adjacent spindle section 12. At the joint in the middle of the partitions of the machine frame 22 are in a known manner between the two end spindles of two Adjacent spindle bank sections 12, the two end pressure rollers 10 each simultaneously for pressing and deflecting the associated Tape used. The diameter of the end pressure rollers 10 is due to the extremely high flexural fatigue strength of the belt 1 kept as small or exactly as small as the diameter of the central pressure rollers that even with the smallest spindle pitch t of about 80 mm, the two end rollers 10 still have space next to one another and nevertheless the whorl wrap angle ß kept the same can be.

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In Figure 2, the drive shaft 2 is the right (24) side of the machine with the smallest possible distance 27 close to the spindle bench 26 shown. It wraps around the belt 1, the drive pulley 4 in a simple manner (saving of pulleys), in the case of itself In rare cases of replacement, a new endless belt can be inserted relatively quickly by releasing the shaft coupling 16. For emergency can a replacement tape 15, already wrapping around the hub 17, in the Drive pulley 4 protected and supported by a cover (not shown), inserted.

In Figure J5 it is true that an endless belt that has just been placed is replaced 1 easier, but the constant effort of two additional idler pulleys Ij5 per field, the lower angle of wrap, as well as increasing the alternating bending stress on the belt and thereby reducing its service life are not worthwhile To want to save the one-time work of releasing the clutch (according to the design according to Fig. 2), which may take several years. The embodiment according to FIG. 2 is therefore preferred, although the embodiment according to FIG. 3 cannot be completely ruled out.

In Figure 4, a double-width drive pulley 18 is on the Center shaft 19 shown with a belt 20 for the left (25) and a belt 21 for the right (24) spindle fields (12).

Claims (2)

ft »♦ t P Atlas-MaK Maschinenbau GmbH - 8 - a 217 - G. 3125 Protection claims 1. Multi-spindle belt drive for spinning and twisting machines, in which all spindles of a spindle bank section3 on one side of the machine are driven by means of a common drive belt from a single drive wheel that sits on a horizontal shaft arranged in the longitudinal direction within the machine, the belt being driven via guide and tension rollers as well as end and middle pulleys on the spindle bench is guided so that it touches all whorls of the spindles on an equal arc of about 15 degrees, characterized in that an endless plastic or plastic composite high-performance spindle drive belt known per se (1, 20, 21) of a certain length that can be used for several spindle sizes, over only one, at most two guide rollers (5, 6, 13) near the drive pulley and one pivoting spring-loaded tensioning roller (J, 8 ) near the end pressure rollers (10) of a spindle ba corresponding to the distance between the walls of the machine frame (22) nk section (12) of about 3.50 - 1.70 m in length is guided on a right (24) or left (25) side of the machine. it ro t ■ - 9 - J 2. Multi-spindle belt drive according to claim 1, characterized shows that the endless spindle drive belt (1) is a known high-performance belt from a double-sided sanded polyurethane layer with stretch-resistant polyester • there is a thread insert, which with certain endless Long in stepped widths between approx. 10 and 25 mm for - Corresponding spindle sizes are cut. J5. Multi-spindle belt drive according to Claims 1 and 2, characterized characterized in that both spindle drive belts (20, 21) of two opposite spindle bank sections (12) at the same time driven spindles are carried along by a correspondingly wide drive pulley (18) lying next to one another. 4. Multi-spindle belt drive according to claims 1-3, characterized in that the machine frame (22) or the drive pulley (4, 18) is equipped with a holder or protective cover for receiving a replacement belt (I5) wrapping around the shaft (2, 19) .